Power to the People:
There is a lot of power in protesting. Are enough people aware that they might die if they go out to an event like this?
Dangers
Generally people are not taught about the dangers of large crowds. When a lot of people are together, it becomes virtual anarchy in some ways. It becomes a potential war. Things can go wrong. It depends on what kind of people are in the crowd. If you have a wide variety of people in the crowds, then that can be a recipe of disaster because you end up having small people, tall people, old people, young people, strong people, weak people, etc. So, people run over other people. And people fight people.
Black Friday
This happens during Black Friday. People die when a lot of people go shopping a day after Thanksgiving each year. People get hurt. Same thing with concerts.
Hong Kong
People should march for freedom like they do in Hong Kong. Actually, secret Chinese police pretend to be protestors in Hong Kong and do bad things to make the protestors look bad. And some of the cops kidnap some of the protestors.
Secret Police
They take many protestors to buildings near the border and torture them. Of course, the media is not going to talk about that because they are fake news and they support China and not Hong Kong. So, many people are dying in Hong Kong. But they are not talking about it.
Fake News
They won't tell you the real numbers. It is bigger than you know. Many different things are happening at the same time. But yes, more people should protest corruption, especially in Vietnam.
Fearing People
Government fear the people more than they know.
Yes, I believe the death toll in Hong Kong during the recent protests is certainly more than the number I have given in this post.
Difference
Hong Kong people have lived for a long time in the separation of powers and universal suffrage system. This is completely different from Vietnamese and mainland Chinese, so Hong Kong people will try to protect and preserve it and most Vietnamese and mainland Chinese don't think about it.
Dangers
I think people who join the crowd are often unaware of the dangers, as you said we are often not taught about.!